Weld Neck Flanges ASME B16.5 Manufacturers, Exporters & Suppliers in India.
304/304L Weld Neck Flanges (WNRF), 310/310S Weld Neck Flanges(WNRF), 316/316L Weld Neck Flanges(WNRF), 317/317L Weld Neck Flanges, 321/321H Weld Neck Flanges, 347/347H Weld Neck Flanges, 446 Weld Neck Flanges.
Stainless Steel, Alloy Steel, Carbon Steel, Duplex steel, Copper Nickel Alloy, Hastelloy, Titanium, Alloy 20, Monel & Inconel Weld Neck Flanges.
This is designed to be joined to a piping system by buttwelding. It is relatively expensive because of Its long neck, but is preferred for high stress applications. The neck, or hub transmits stresses to the the base of the hub to the wall thickness at the butt weld, provide important reinforcement of the flange. The bore of the flange matches the bore of the pipe, reducing turbulence and erosion.
| Material of Construction | Standard | Grades |
|---|---|---|
| Stainless Steel Weld Neck Flanges | ASTM A182 , A240 | F 304, 304L, 304H, 316, 316Ti, 316H, 316L, 316LN, 309S, 309H, 310S, 310H,317, 317L, 321, 321H, 347, 347H, 201, 202, 904L |
| Carbon Steel Weld Neck Flanges | ASTM A105 | Gr. F42,46,52,56,60,65,70 |
Alloy Steel Weld Neck Flanges | ASTM A182 | F1,F5,F9,F11,F22,F91 |
| Nickel Alloy Weld Neck Flanges | ASTM SB564, SB160, SB472, SB162 | Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), |
| Copper Alloys Weld Neck Flanges | ASTM SB 61 , SB62 , SB151 , SB152 | UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, |
| Low Temperature Carbon Steel Weld Neck Flanges | ASTM A350 | LF2 , LF3 |
| Duplex Steel Weld Neck Flanges | ASTM A182, A240 | UNS F 44, F 45, F51, F 53, F 55, F 60, F 61 |
Dimensional Tolerances of Welding Neck Flanges ASME 16.5
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm | Inside Diameter ≤ 10 = ± 0.8 mm | 12 thru 18 = 1.6 mm | ≥ 20 = + 3.2 mm / – 1.6 mm |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm | Diameter of Hub at Base ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
| Diameter of Hub at Point of Welding ≤ 5 = + 2.4 mm / – 0.8 mm | ≥ 6 = + 4.0 mm / – 0.8 mm | Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max |
| Thickness ≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0 | Length thru Hub ≤ 10 = 1.6 mm | ≥ 12 = ± 3.2 mm |